CN111731428B - Electric vehicle handlebar device - Google Patents
Electric vehicle handlebar device Download PDFInfo
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- CN111731428B CN111731428B CN202010707318.9A CN202010707318A CN111731428B CN 111731428 B CN111731428 B CN 111731428B CN 202010707318 A CN202010707318 A CN 202010707318A CN 111731428 B CN111731428 B CN 111731428B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K23/00—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips
- B62K23/02—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips hand actuated
- B62K23/04—Twist grips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J3/00—Acoustic signal devices; Arrangement of such devices on cycles
- B62J3/10—Electrical devices
- B62J3/12—Buzzers; Horns with electrically driven airflow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
- B62J45/40—Sensor arrangements; Mounting thereof
- B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
- B62J6/22—Warning or information lights
- B62J6/24—Warning or information lights warning or informing the rider, e.g. low fuel warning lights
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Control Of Electric Motors In General (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The embodiment of the invention discloses an electric vehicle rotating handle device which comprises a rotating assembly, a fixing assembly and a motor controller, wherein a magnet is arranged on the rotating assembly, a first Hall element and a second Hall element are arranged on the fixing assembly, the rotating assembly is nested in the fixing assembly and rotates relative to the fixing assembly, the magnet moves relative to the first Hall element and the second Hall element, the first Hall element senses a magnetic field signal of the magnet to generate a first voltage signal, the second Hall element senses a magnetic field signal of the magnet to generate a second voltage signal, and the motor controller is used for adjusting the rotating speed of the motor according to the first voltage signal or the second voltage signal when detecting that the first voltage signal and the second voltage signal meet a preset voltage rule. According to the embodiment of the invention, the speed regulation is realized by adopting the double Hall elements, and whether the rotating handle demand signal is reliable or not is judged according to the two Hall voltage parameter values, so that the anti-interference device has stronger anti-interference performance, stability and safety.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric vehicles, in particular to an electric vehicle rotating handle device.
Background
At present, the industry development of electric vehicles is rapid, and the types of electric vehicles are various, such as two-wheeled electric bicycles, light motorcycles and electric motorcycles, three-wheeled electric vehicles and four-wheeled electric vehicles, and the market share is very high. The electric vehicle adopts a handle to regulate the speed. When the handle rotates, the Hall element integrated in the handle detects the magnetic field change and outputs a corresponding voltage signal, so that the electric vehicle controller can realize speed regulation.
However, based on the electric vehicle with the speed regulation structure, signal transmission errors can occur under the condition of being interfered, and the electric vehicle controller can receive the wrong Hall voltage signals, so that the electric vehicle controller can make wrong judgment, and wrong actions are generated to influence driving safety.
Disclosure of Invention
The embodiment of the invention provides a turning handle device of an electric vehicle, which aims to solve the problem of low anti-interference performance of the existing turning handle.
The embodiment of the invention provides an electric vehicle rotating handle device, which comprises a rotating assembly, a fixing assembly and a motor controller, wherein the rotating assembly is connected with the motor controller;
the rotating assembly is provided with a magnet;
the fixed assembly is provided with a first Hall element and a second Hall element, the rotating assembly is nested in the fixed assembly and rotates relative to the fixed assembly, so that the magnet moves relative to the first Hall element and the second Hall element, the first Hall element senses a magnetic field signal of the magnet to generate a first voltage signal, and the second Hall element senses the magnetic field signal of the magnet to generate a second voltage signal;
And the motor controller is used for adjusting the motor rotating speed according to the first voltage signal or the second voltage signal when detecting that the first voltage signal and the second voltage signal meet a preset voltage rule.
Further, the Hall element comprises an anode connected with the anode lead, a cathode connected with the cathode lead and a signal end connected with the signal transmission line;
The motor controller comprises a power supply unit, a signal processing unit and a motor driving unit, wherein the power supply unit supplies power to the Hall element through the positive electrode lead wire and the negative electrode lead wire, the signal processing unit respectively acquires the first voltage signal and the second voltage signal through two signal transmission lines, a speed change instruction is generated when the two voltage signals are detected to meet the preset voltage rule, and the motor driving unit adjusts the rotating speed according to the speed change instruction.
Further, the first hall element and the second hall element are arranged in close proximity and are positioned on the first side or the second side of the magnet, and the rotation direction of the magnet is the same as or opposite to the direction in which the first side of the magnet points to the second side of the magnet.
Further, the signal processing unit is configured to generate the speed change command according to the first voltage signal when detecting that a voltage difference value between the first voltage signal and the second voltage signal is within a preset difference value range.
Further, the first hall element is located at a first side of the magnet, and the second hall element is located at a second side of the magnet, and a rotation direction of the magnet is the same as or opposite to a direction in which the first side of the magnet points to the second side of the magnet.
Further, the signal processing unit is configured to generate the speed change command according to the first voltage signal when detecting that the voltage change rate of the first voltage signal and the voltage change rate of the second voltage signal both meet a second voltage preset rule.
Further, the first hall element and the second hall element are arranged at intervals and are both located on the first side or the second side of the magnet, the second hall element is far away from the magnet relative to the first hall element, and the rotation direction of the magnet is the same as or opposite to the direction that the first side of the magnet points to the second side of the magnet.
Further, the signal processing unit is configured to generate the speed change command according to the first voltage signal when detecting that a voltage ratio deviation of the first voltage signal and the second voltage signal is within a deviation preset range.
Further, the electric vehicle steering handle device also comprises an alarm unit;
The alarm unit is electrically connected with the motor controller, and the motor controller is used for generating a fault alarm signal to enable the alarm unit to perform handle turning fault alarm when detecting that the first voltage signal and/or the second voltage signal do not meet the preset voltage rule.
In the embodiment of the invention, the rotating assembly rotates, the first Hall element senses a magnetic field signal of the magnet to generate a first voltage signal, the second Hall element senses the magnetic field signal of the magnet to generate a second voltage signal, and the motor controller adjusts the motor rotating speed according to the first voltage signal or the second voltage signal when detecting that the first voltage signal and the second voltage signal meet a preset voltage rule. In the embodiment of the invention, the speed regulation is realized by adopting the double-Hall element, and the speed regulation is only carried out if the voltage signal or the voltage related data of the double-Hall element meets the preset voltage rule, otherwise, the corresponding operation is not carried out, so that whether the handle demand signal is reliable or not is judged according to the two Hall voltage parameter values, and the anti-interference performance, the stability and the safety are stronger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, a brief description will be given below of the drawings required for the embodiments or the description of the prior art, and it is obvious that although the drawings in the following description are specific embodiments of the present invention, it is obvious to those skilled in the art that the basic concepts of the device structure, the driving method and the manufacturing method, which are disclosed and suggested according to the various embodiments of the present invention, are extended and extended to other structures and drawings, and it is needless to say that these should be within the scope of the claims of the present invention.
FIG. 1 is a schematic view of an electric vehicle handle device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the connection of a motor controller to a Hall element in an embodiment of the present invention;
FIG. 3 is a schematic view of the maximum limit position of the electric vehicle handle device according to the embodiment of the invention;
FIG. 4 is a schematic view of another electric vehicle handlebar arrangement according to an embodiment of the present invention;
FIG. 5 is a schematic view of a further electric vehicle handlebar arrangement according to an embodiment of the present invention;
fig. 6 is a circuit configuration diagram of an electric vehicle steering handle device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described by means of implementation examples with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the basic concepts disclosed and suggested by the embodiments of the present invention are within the scope of the present invention.
Referring to fig. 1, a schematic diagram of an electric vehicle handle device according to an embodiment of the present invention is shown. The electric vehicle handle device provided by the embodiment is composed of a software and/or hardware structure and is configured in an electric vehicle, and the electric vehicle can be any electric vehicle integrated with a handle, such as an electric bicycle, an electric motorcycle, an electric tricycle, an electric four-wheel vehicle and the like, and the handle can be a handle or a rotary table. It will be appreciated that the handle means comprises a handle and associated control components electrically connected to the handle, which may be integrated together or separately located, without specific limitation to the structural position thereof. Fig. 2 is a schematic diagram of connection between a motor controller and a hall element, and fig. 3 is a schematic diagram of another electric vehicle handle device.
The electric vehicle handle device comprises a rotating assembly 1, a fixing assembly 2 and a motor controller 3, wherein a magnet 11 is arranged on the rotating assembly 1, a first Hall element 21 and a second Hall element 22 are arranged on the fixing assembly 2, the rotating assembly 1 is nested in the fixing assembly 2 and rotates relative to the fixing assembly 2, the magnet 11 moves relative to the first Hall element 21 and the second Hall element 22, the first Hall element 21 senses a magnetic field signal of the magnet 11 to generate a first voltage signal, the second Hall element 22 senses a magnetic field signal of the magnet 11 to generate a second voltage signal, and the motor controller 3 is used for adjusting the motor rotation speed according to the first voltage signal or the second voltage signal when detecting that the first voltage signal and the second voltage signal meet a preset voltage rule.
In this embodiment, the electric vehicle handle device includes a rotating assembly 1, the rotating assembly 1 is integrated on a handle, and a user rotates the handle to drive the rotating assembly 1 to rotate synchronously or integrally. The electric vehicle rotating handle device further comprises a fixing component 2, wherein the fixing component 2 is fixed on a vehicle body and is usually in butt joint with the rotating handle, and the rotating component 1 is nested in the fixing component 2 and rotates relative to the fixing component 2, and the rotating direction is shown by a double-headed arrow in fig. 1. The user rotates the rotary handle to drive the rotary assembly 1 to rotate anticlockwise or clockwise in the fixed assembly 2.
It is understood that the opening range of the turning handle is set to 0-60 deg., the position of the left end face of the magnet 11 corresponding to the opening of the turning handle is set to 0 deg. when the left end face of the magnet 11 is located at the point a, the position of the maximum opening of the turning handle is set to 60 deg. when the left end face of the magnet 11 is located at the point C, then the opening of the turning handle is set to 0 deg. and the left end face of the magnet 11 is located at the point a in the initial state such as the parking state/power off state of the vehicle, and the opening of the turning handle is not 0 deg. and the left end face of the magnet 11 is located between AC in the running state of the vehicle, wherein the maximum opening of the turning handle can reach 60 deg. and the left end face of the magnet 11 does not exceed the point C in the running state, fig. 1 shows the initial position of the opening of the turning handle by 0 deg., and fig. 3 shows the limit position of the opening of the turning handle by 60 deg.. From this, it is clear that the clockwise rotation of the knob increases the knob opening from small to large, that is, the left end face of the magnet 11 can be moved to the point C at maximum, and the counterclockwise rotation of the knob decreases the knob opening from large to small, and the left end face of the magnet 11 can be moved to the point a at minimum.
In this embodiment, the rotating assembly 1 is provided with a magnet 11, and the optional magnet 11 is provided on the end surface of the rotating assembly 1 facing the fixed assembly 2. The fixed assembly 2 is provided with a first hall element 21 and a second hall element 22, and the first hall element 21 and the second hall element 22 are optionally arranged on the end surface of the fixed assembly 2 facing the rotating assembly 1. The user rotates the rotating handle to drive the rotating assembly 1 to rotate anticlockwise or clockwise in the fixed assembly 2, so that the distance between the magnet 11 positioned on the rotating assembly 1 and the first Hall element 21 positioned on the fixed assembly 2 changes, and the first Hall element 21 senses different magnetic field signals in the rotating process of the magnet 11, so that a linearly-changing voltage signal, namely a first voltage signal, is output. Similarly, the distance between the magnet 11 on the rotating component 1 and the second hall element 22 on the fixed component 2 changes, and the second hall element 22 senses different magnetic field signals during the rotation of the magnet 11, so as to output a linearly-changing voltage signal, namely a second voltage signal.
If there is external magnetic interference, the magnetic field signal sensed by the first hall element and/or the second hall element will be abrupt, and the output first voltage signal and/or the second voltage signal will not change linearly.
The motor controller 3 is electrically connected to the first hall element 21 and the second hall element 22, respectively, and the motor controller 3 may alternatively supply power to the first hall element 21 and the second hall element 22, respectively, and in other embodiments may alternatively supply power to both hall elements separately from a power supply unit external to the motor controller. The motor controller 3 also acquires a first voltage signal of the first hall element 21 and a second voltage signal of the second hall element 22, respectively, and adjusts the speed. Specifically, the motor controller 3 is configured to detect whether the first voltage signal and the second voltage signal meet a preset voltage rule, and if so, adjust the motor rotation speed according to the first voltage signal or the second voltage signal.
The motor controller 3 comprises a power supply unit 31, a signal processing unit 32 and a motor driving unit 33, wherein the power supply unit 31 supplies power to the Hall element through the positive electrode lead and the negative electrode lead, the signal processing unit 32 respectively acquires a first voltage signal and a second voltage signal through the two signal transmission lines, and generates a speed change command when detecting that the two voltage signals meet a preset voltage rule, and the motor driving unit 33 adjusts the rotating speed according to the speed change command.
The motor device comprises a motor controller 3 and a motor 4, wherein the motor controller 3 is electrically connected with the motor 4, and the motor driving unit 33 adjusts the rotating speed of the motor 4 according to a speed change instruction. It will be appreciated that if the signal processing unit 32 detects that the two voltage signals do not meet the preset voltage rule, no shift command is generated, and the motor driving unit 33 keeps the current rotation speed unchanged.
After the positions of the first hall element 21, the second hall element 22 and the magnet 11 are set, the handle is tested before shipping, the handle is rotated from 0 ° to 60 ° and then rotated from 60 ° to 0 °, and the first voltage data of the first hall element 21 under different magnetic fields and the second voltage data of the second hall element 22 under different magnetic fields are detected to obtain voltage related data between the first voltage data and the second voltage data, wherein the voltage related data between the first voltage data, the second voltage data and the first voltage data and the second voltage data are all used as preset voltage rules, the preset voltage rules are stored in a memory of the electric vehicle, the memory may be a memory such as a flash memory, and the memory may be integrated in the motor controller 3.
In this embodiment, the motor rotation speed is set to be associated with the first voltage data, and is adjusted according to the first voltage signal, so that the association relationship is unchanged in the subsequent normal use. Or in other embodiments, the optional motor speed is associated with the second voltage data, and is adjusted according to the second voltage signal, so that the association relationship is unchanged in subsequent normal use.
In actual use, the motor controller 3 obtains a first voltage signal and a second voltage signal, compares the first voltage signal with first voltage data in the memory, determines that the first voltage signal meets the first voltage data rule when the first voltage signal is matched with the first voltage data according to the rule of magnetic field intensity change, compares the second voltage signal with second voltage data in the memory, determines that the second voltage signal meets the second voltage data rule when the second voltage signal is matched with the second voltage data according to the rule of magnetic field intensity change, and accordingly determines that the first voltage signal and the second voltage signal meet the preset voltage rule, and adjusts the motor rotating speed according to the first voltage signal related to the motor rotating speed. Or alternatively
The motor controller 3 obtains a first voltage signal and a second voltage signal, obtains voltage related data between the first voltage signal and the second voltage signal, compares the voltage related data between the first voltage data and the second voltage data in the memory, and if the voltage related data is matched with pre-stored voltage related data, it can be determined that the first voltage signal and the second voltage signal meet a preset voltage rule, and then adjusts the motor rotation speed according to the first voltage signal related to the motor rotation speed.
As described above, if the voltage signal generated by at least one hall element suddenly changes to fail to satisfy the preset voltage rule when the motor is disturbed or fails, the motor controller may determine that the abnormality such as the disturbance or the failure occurs according to the signals of the two hall elements. Specifically, the change rule of the first voltage signal output by the first hall element 21 exceeds the first voltage data, the change rule of the second voltage signal output by the second hall element 22 exceeds the second voltage data, or the change rule of the voltage related data between the first voltage signal and the second voltage signal is different from the change rule of the pre-stored voltage related data, so that the fault or the interference can be determined, and the corresponding motor rotation speed adjustment is not performed any more.
In the embodiment, the rotating assembly rotates, the first Hall element senses a magnetic field signal of the magnet to generate a first voltage signal, the second Hall element senses a magnetic field signal of the magnet to generate a second voltage signal, and the motor controller adjusts the motor rotation speed according to the first voltage signal or the second voltage signal when detecting that the first voltage signal and the second voltage signal meet a preset voltage rule. In this embodiment, the speed regulation is realized by adopting the double hall element, and the speed regulation is only performed if the voltage signal or the voltage related data of the double hall element meets the preset voltage rule, otherwise, the corresponding operation is not performed, so that whether the handle demand signal is reliable or not is judged according to the two hall voltage parameter values, and the anti-interference performance, the stability and the safety are stronger.
On the basis of the above technical solution, the optional first hall element 21 is located on the first side of the magnet 11, and the second hall element 22 is located on the second side of the magnet 11, as shown in fig. 1 and 3, and the rotation direction of the magnet 11 is the same as or opposite to the direction in which the first side of the magnet 11 points to the second side of the magnet 11. The optional signal processing unit is used for generating a speed change instruction according to the first voltage signal when detecting that the voltage change rate of the first voltage signal and the voltage change rate of the second voltage signal meet the voltage preset rule. The first side of the optional magnet 11 is the left end face of the magnet 11, and the second side of the magnet 11 is the right end face of the magnet 11.
Referring to fig. 1 and 3, in an acceleration state of the electric vehicle, the handle assembly 1 rotates clockwise, the rotation direction of the magnet 11 is the same as the direction in which the first side of the magnet 11 is directed to the second side of the magnet 11, the distance between the first hall element 21 and the magnet 11 is increased from small to small, the magnetic field signal of the magnet 11 sensed by the first hall element 21 is increased from large to small, first voltage data which is linearly decreased is generated in a test before shipping, and in a deceleration state of the electric vehicle, the handle assembly 1 rotates counterclockwise, the rotation direction of the magnet 11 is opposite to the direction in which the first side of the magnet 11 is directed to the second side of the magnet 11, the distance between the first hall element 21 and the magnet 11 is increased from large to small, and the magnetic field signal of the magnet 11 sensed by the first hall element 21 is increased from small to large, first voltage data which is linearly increased is generated in the test before shipping. Similarly, the second voltage data increases linearly in the acceleration state and decreases linearly in the deceleration state. For example, in the acceleration state, the absolute value of the voltage increment of the first voltage data is almost equal to the voltage increment of the second voltage data for a certain period of time.
The two Hall sensors are arranged at the two ends of the magnet, and then two Hall voltage signals output by the two Hall sensors are changed from large to small and from small to large, so that under normal conditions, the change rate difference of the two Hall voltages at any moment is smaller and almost consistent, and whether the voltage change rates of the two Hall voltage signals are consistent or not can be judged to judge whether interference exists or not. If the speed change command is met, the motor controller issues a speed change command, and if the speed change command is not met, a turning handle fault is reported, so that the speed change caused by other interferences can be avoided. If the handle turning device is disturbed or fails, the voltage signal generated by the first Hall element is suddenly changed, and/or the voltage signal generated by the second Hall element is suddenly changed, so that the voltage change rates of the two Hall voltage signals are greatly different.
In actual use, the first hall element 21 generates a first voltage signal according to the magnetic field signal of the magnet 11, and the second hall element 22 generates a second voltage signal according to the magnetic field signal of the magnet 11. When the signal processing unit determines that the voltage change rate of the first voltage signal and the voltage change rate of the second voltage signal meet the voltage preset rule, the electric vehicle is not interfered or failed, and a speed change instruction is generated according to the first voltage signal.
If the first voltage signal is in a curve change, linear increase or discrete state change and/or the second voltage signal is in a curve change, linear decrease or discrete state change in the current acceleration state, the signal processing unit detects that the voltage change rate of the first voltage signal and the second voltage signal does not meet the voltage preset rule in the acceleration state. At this time, it can be determined that the electric vehicle is subject to external disturbance or failure, the signal processing unit does not produce a speed change instruction, and the motor is not changed in speed and keeps running at the current speed.
In this embodiment, speed regulation is achieved by using a dual hall element, two hall sensors transmit a voltage signal Ua and Ub respectively, and under normal conditions, the voltage change rates of the two voltage signals should both satisfy the voltage change rule thereof, and when the handle is disturbed or abnormal in operation, at least one of Ua and Ub does not satisfy the voltage change rule thereof. In actual work, the motor controller such as MCU receives Ua and Ub, if the voltage signal meets the voltage change rule, the MCU adjusts the speed correspondingly according to the Hall voltage signal of Ua, otherwise, the MCU judges the turning handle fault and does not perform corresponding action. In summary, the double-Hall speed regulation can judge whether the handle demand signal is reliable according to the two Hall voltage parameter values, and the mode has stronger anti-interference performance.
On the basis of the above technical solution, the optional first hall element 21 and the second hall element 22 are disposed in close proximity to each other as shown in fig. 4 and located on the first side or the second side of the magnet 11, and the rotation direction of the magnet 11 is the same as or opposite to the direction in which the first side of the magnet 11 points to the second side of the magnet 11. The signal processing unit is used for generating a speed change instruction according to the first voltage signal when detecting that the voltage difference value of the first voltage signal and the second voltage signal is in a preset difference value range. The first side of the optional magnet 11 is a left side end face of the magnet 11, and the second side is a right side end face of the magnet 11, and the two hall elements are located on the left side end face of the magnet 11, and in other embodiments, the two hall elements may be located on the right side end face of the magnet. The close proximity arrangement refers to that the two Hall elements are almost in contact on the basis of ensuring the insulation arrangement of the two Hall elements, and the arrangement direction of the two Hall elements is parallel or perpendicular to the rotation direction.
The first hall element 21 and the second hall element 22 are disposed in close proximity and located at the first side of the magnet 11, so that magnetic field signals sensed by the first hall element 21 and the second hall element 22 in a normal state are almost consistent, and a difference value between the first voltage data and the second voltage data corresponding to any moment does not exceed a preset difference value range. For example, in an acceleration state of the electric vehicle, the handle assembly 1 rotates clockwise, the rotation direction of the magnet 11 is the same as the direction that the first side of the magnet 11 points to the second side of the magnet 11, the distances between the two hall elements and the magnet 11 are all from small to large, the magnetic field signal of the magnet 11 sensed by any hall element is from large to small, first voltage data which is linearly reduced and second voltage data which is linearly reduced are generated in a test before delivery, and the difference value of the two voltage data at the same moment does not exceed a difference value preset range. Similarly, in the deceleration state of the electric vehicle, the handle assembly 1 rotates anticlockwise, the rotation direction of the magnet 11 is opposite to the direction of the first side of the magnet 11 pointing to the second side of the magnet 11, first voltage data which is linearly increased and second voltage data which is linearly increased are generated in the test before delivery, and the difference value of the two voltage data at the same moment does not exceed the preset difference value range. The upper limit of the preset range of the optional difference value is the maximum error value of the first voltage data and the second voltage data at the same time.
If the handle device is disturbed or fails, the voltage signal generated by the first hall element will be suddenly changed, and/or the voltage signal generated by the second hall element will be suddenly changed.
In actual use, the first hall element 21 generates a first voltage signal according to the magnetic field signal of the magnet 11, and the second hall element 22 generates a second voltage signal according to the magnetic field signal of the magnet 11. The signal processing unit calculates that the voltage difference value of the first voltage signal and the second voltage signal at the same moment is in a preset difference value range, and the fact that the electric vehicle is not interfered or failed externally is indicated, and at the moment, a speed change instruction is generated according to the first voltage signal. On the contrary, the electric vehicle can be judged to be subjected to external interference or faults, the signal processing unit can not produce a speed change instruction, and then the motor is not changed in speed and keeps running at the current speed.
In the embodiment, speed regulation is realized by adopting double Hall elements, two Hall sensors respectively transmit one voltage signal Ua and Ub, and under normal conditions, the two voltage signals are in a certain difference relation, for example, ub-Ua is less than or equal to V0, and when a rotating handle is interfered or abnormal in operation, the difference value between Ua and Ub is overlarge. In actual operation, the motor controller such as MCU receives Ua and Ub and compares them, if the voltage difference is smaller than or equal to V0, the MCU adjusts the speed according to the Hall voltage signal of Ua, when the voltage difference is larger than V0, the MCU judges the turning handle fault and does not perform corresponding action. In summary, the double-Hall speed regulation can judge whether the handle demand signal is reliable according to the two Hall voltage parameter values, and the mode has stronger anti-interference performance.
On the basis of the above technical solution, the optional first hall element 21 and the second hall element 22 are spaced apart from each other as shown in fig. 5, and are located on the first side or the second side of the magnet 11, the second hall element 22 is far away from the magnet 11 relative to the first hall element 21, and the rotation direction of the magnet 11 is the same as or opposite to the direction in which the first side of the magnet 11 points to the second side of the magnet 11. The optional signal processing unit is used for generating a speed change instruction according to the first voltage signal when detecting that the voltage proportion deviation of the first voltage signal and the second voltage signal is within a deviation preset range.
The first side of the optional magnet 11 is a left side end face of the magnet 11, and the second side is a right side end face of the magnet 11, and the two hall elements are located on the left side end face of the magnet 11, and in other embodiments, the two hall elements may be located on the right side end face of the magnet. The first hall element 21 and the second hall element 22 are arranged at intervals and are positioned on the first side of the magnet 11, and the magnetic field signals sensed by the first hall element 21 and the second hall element 22 in a normal state have consistent linear change rules but different magnitudes. In an initial state, output voltages of two Hall elements, namely Hall sensors, are detected respectively, an initial proportion a is determined, two Hall voltage signals are detected respectively in the later use process, and whether voltage proportion deviation is within a given voltage deviation range (such as +/-b%) is determined.
In the acceleration state of the electric vehicle, the handle assembly 1 rotates clockwise, the rotation direction of the magnet 11 is the same as the direction of the first side of the magnet 11 pointing to the second side of the magnet 11, the distances between the two Hall elements and the magnet 11 are all from small to large, the magnetic field signal of the magnet 11 sensed by any one Hall element is from large to small, first voltage data which is linearly reduced and second voltage data which is linearly reduced are generated in the test before delivery, and the voltage proportion deviation of the two voltage data at the same moment does not exceed the deviation preset range. Similarly, in the deceleration state of the electric vehicle, the handle assembly 1 rotates anticlockwise, the rotation direction of the magnet 11 is opposite to the direction of the first side of the magnet 11 pointing to the second side of the magnet 11, first voltage data which is linearly increased and second voltage data which is linearly increased are generated in the test before delivery, and the voltage proportion deviation of the two voltage data at the same moment does not exceed the deviation preset range. The selectable deviation preset range is a range formed by a maximum deviation value and a minimum deviation value of the ratio of the first voltage data to the second voltage data at the same time.
If the handle device is disturbed or fails, the voltage signal generated by the first hall element is suddenly changed, and/or the voltage signal generated by the second hall element is suddenly changed, so that the voltage ratio of the two is suddenly changed, and the deviation is beyond the preset range.
In actual use, the first hall element 21 generates a first voltage signal according to the magnetic field signal of the magnet 11, and the second hall element 22 generates a second voltage signal according to the magnetic field signal of the magnet 11. The signal processing unit calculates that the voltage proportion deviation of the first voltage signal and the second voltage signal at the same moment is in a deviation preset range, and the fact that the electric vehicle is not interfered or failed externally is indicated, and at the moment, a speed change instruction is generated according to the first voltage signal. On the contrary, the electric vehicle can be judged to be subjected to external interference or faults, the signal processing unit can not produce a speed change instruction, and then the motor is not changed in speed and keeps running at the current speed.
In this embodiment, speed regulation is achieved by using a dual hall element, and the two hall sensors transmit a voltage signal Ua and Ub respectively, and under normal conditions, the two voltage signals are in a certain proportional relationship, for example Ub is about equal to 2Ua, and when the steering handle is interfered or abnormal in operation, the voltage correlation between Ua and Ub is reduced. In actual operation, the motor controller, such as the MCU, receives Ua and Ub and compares them, if the voltage ratio is within the preset reference range (e.g. + -10%), the MCU adjusts the speed according to the Hall voltage signal of Ua, such as Ub=2.05Ua, and when the voltage ratio deviation exceeds the deviation preset range (e.g. + -10%), the MCU determines that the rotating handle is faulty, and does not perform the corresponding action, such as Ub=3.5Ua. In summary, the double-Hall speed regulation can judge whether the handle demand signal is reliable according to the two Hall voltage parameter values, and the mode has stronger anti-interference performance.
On the basis of the technical scheme, the optional electric vehicle steering handle device further comprises an alarm unit 5, wherein the alarm unit 5 is electrically connected with the motor controller 3, and the motor controller 3 is used for generating a fault alarm signal to enable the alarm unit 5 to perform steering handle fault alarm when detecting that the first voltage signal and/or the second voltage signal do not meet a preset voltage rule.
In this embodiment, when the motor controller 3 detects that the first voltage signal and/or the second voltage signal do not meet the preset voltage rule, it may be determined that the electric vehicle is subjected to an abnormality such as external interference or a failure, and the like, and then the motor controller 3 will not generate a speed change command, and the motor 4 keeps running at the current speed. In synchronization, the motor controller 3 generates a fault alarm signal and sends the fault alarm signal to the alarm unit 5, the alarm unit 5 carries out rotating handle fault alarm, and the optional alarm unit 5 is a buzzer and/or an indicator lamp, such as a buzzer buzzing alarm or an indicator lamp flashing alarm.
The electric vehicle handle device provided by any embodiment has the advantages of higher stability and anti-interference performance, avoids the situation that the motor rotates due to static in situ, and also avoids the problem that the speed is continuously changed due to the rotation of the motor.
It can be understood that the electric vehicle provided by any embodiment of the foregoing may be an electric vehicle, and the steering handle device may be regarded as an accelerator control structure of the electric vehicle, where two hall sensors are used to detect the change of the magnetic field angle at the same time, and the hall voltage signals output by the two hall sensors are amplified, filtered, translated, and limited by the signal processing circuit to form two paths of pedal position voltage signals. The electronic control unit ECU of the electric automobile can judge whether the pedal position sensor works normally or not by comparing the correlation of the two pedal position voltage signals. The accuracy of voltage signals is improved, the speed change control is more accurate, and the anti-interference capability is stronger.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
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| CN113428281A (en) * | 2021-08-02 | 2021-09-24 | 重庆虬龙科技有限公司 | Electric motorcycle double-Hall electronic rotating handle |
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| ITTO20060526A1 (en) * | 2006-07-19 | 2008-01-20 | Bitron Spa | KNOB CONTROL DEVICE, PARTICULARLY FOR MOTOR VEHICLES. |
| CN101407183B (en) * | 2008-11-20 | 2012-05-23 | 宋在务 | Controller of electric vehicle |
| KR20120101388A (en) * | 2009-11-30 | 2012-09-13 | 닛폰 세이키 가부시키가이샤 | Position detecting device |
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| CN203558176U (en) * | 2013-07-24 | 2014-04-23 | 南京三叶金鹰摩托车有限公司 | Speed-regulating handle capable of being rotated clockwise and counterclockwise and used for electric vehicle and electric vehicle power control device |
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